JPS6141513Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a built-in valve body for closing the flow path, and the plug connected to the fluid supply side can be engaged and detached from the plug insertion hole of the coupler body connected to the compressed fluid supply side. Accordingly, the present invention relates to an improvement of a pipe connection/disconnection device for a plug-type pipe joint for forming a compressed fluid passage, in which the compressed fluid passage is automatically opened and closed.

As is well known, one type of pipe joint for forming a passage for compressed fluid is a coupler for air tools. A small hole is formed in the tube wall on the insertion side of the air supply side plug in the cylindrical air supply side coupler body, which is also called a cylindrical air supply side coupler body. There is a type that locks the plug by pressing a small ball for plug locking with a slider that is slidably fitted on the outer periphery of the plug, and then releases the pressure to release the lock of the plug. To connect the connector using the above format, first pull the slider in the same direction as the plug insertion direction against the spring force, and in this state insert the plug into the coupler body. The insertion operation pushes the closing valve body to open the air passage, then returns the slider to its original position, pushes down the plug locking ball to lock the plug, and removes the plug. Then, in the same manner as described above, the slider was pulled to release the plug from the small ball, and the plug was pulled out, and the air passage was closed along with this detachment operation. By the way, when using this format,
In particular, when inserting a plug into the coupler body and connecting it, first slide and maintain the slider in the same direction as the plug insertion direction against the elastic force of the spring, and then insert the plug. Not only does it take time to connect because it requires two operations: plugging it in, but when it is disconnected, the compressed air remaining in the tool side, that is, the air usage side, blows out from the plug. There are also unavoidable drawbacks such as the generation of loud exhaust noise and the shock to the operator, and with the spread of this type of tool, calls for improvement have been increasing year by year.

In view of the above-mentioned current situation, the present invention has been developed for a compressed fluid passage blocker which is elastically loaded in the large diameter part of the central part of the cylindrical coupler body connected to the compressed fluid supply side so as to be able to move back and forth freely. When the cylindrical plug connected to the compressed fluid use side and the fluid supply side is inserted and stopped, the valve body is pushed to open the fluid passage, and when the plug is pulled out from the coupler body and removed. In a pipe joint for forming a compressed fluid passage in which the valve body returns to its original position and closes the compressed fluid passage, the number of holes in the axial direction in the cylindrical wall part of the plug for locking insertion into the coupler body. A plug locking piston, which is pushed outward by compressed fluid pressure when the insertion into the coupler body is stopped, is hermetically sealed in the through hole so that it can slide freely, while the cylindrical wall of the coupler body Several plug locking holes into which only the head of the plug locking piston are inserted are formed in the cylindrical wall, and on the outer periphery of the cylindrical wall into which the small holes are opened, an external hole is formed inside the small holes. An annular band made of elastic material is provided with a small protrusion that can be inserted from one side, and this band is lifted up by a plug locking piston pushed by compressed fluid pressure when the plug stops being inserted through the small protrusion. However, by pressing this from the outside, the lower end of the plug locking piston is made to protrude into the plug, narrowing the fluid passage of the plug, and at the same time making it possible to extract and remove the plug from the coupler body. First, when connecting and locking the plug connected to the fluid supply side to the fluid use side to the coupler body connected to the compression supply side, conventionally, the operation was performed as described above. Instead of requiring two difficult operations, the plug can be connected and locked into the coupler body with just one simple operation of simply inserting the plug into the coupler body, which is commonly known as a one-touch operation. The passage is opened at the same time, and the plug is then removed from the coupler body by simply pressing the annular band made of elastic material from the outside. At the same time, it has become possible to narrow the fluid passage of the plug, suppress the exhaust noise generated when the plug is detached from the coupler body, and eliminate hearing impairment for the operator.

The present invention has made it possible to provide a pipe connection/disconnection device for a pipe joint for forming a compressed fluid passage that can exhibit excellent effects such as the following.Details will be given below with reference to an illustrated embodiment in which the present invention is applied to a coupler for an air tool. This will be explained below.

In the figure, X indicates the coupler main body A according to the present invention, which is connected to the end of the conventional air supply source side, and the base end of the air tool on the air use side, that is, the base of the air supply side to the air tool. This is a coupler for an air tool, consisting of a cylindrical plug B connected to the end.

The coupler body A is formed on the outer periphery of the coupler base 1 on the air supply side, including a coupler base 1, which will be described later, a cylindrical member 11 for connecting an air supply rubber tube etc., which is tightly inserted from the air supply side of the coupler base 1. While holding down the outer periphery of the air supply rubber tube T ₁ which is screwed into the screw and connected to the connection member 11,
A cylindrical member 12 for holding down the air supply rubber tube, etc., which is also used to prevent the connecting member 11 from coming off, and an air passage described later that is constantly pushed toward the insertion side of the plug B by a spring 13. Closure valve body 1
4, the coupler base 1 has an air passage 2
It has a cylindrical shape to form a cylindrical shape, and is provided at a position slightly closer to the insertion side of the plug B than the middle of its inner circumference, and on one side of the annular projecting wall 3 which also serves as a guide path for the insertion of the plug B. , a valve seat 4 made of an elastic material or the like is attached to the valve body 14, and an annular recess 5 for supporting a packing 6 for maintaining airtightness when the plug B is inserted is formed on the inner peripheral surface; The outer periphery of several small holes 7 for plug locking in the axial direction, which are opened near the insertion side edge of the plug B, are fitted from the outside into the small holes 7, and the holes 7 of the plug B, which will be described later, are inserted into the small holes 7 from the outside. It is surrounded by an annular band 8 made of an elastic material and equipped with a small protrusion 9 that is lifted outward by the head 28 of the plug locking piston 27 of the plug B when the plug is inserted and locked. The body 14 includes a disc-shaped valve base 15,
In order to move the valve base body 15 back and forth along the axial direction against the force of the spring 13, it is formed with a leg portion 16 that is slidable along the inner circumferential wall of the annular projecting wall 3.

Further, the plug B is also formed into a cylindrical plug base 21 in order to form an air passage 22, and its tip 23 is guided by an annular projecting wall 3 provided on the inner periphery of the coupler base 1 in the coupler body A. The rear end portion 24 is inserted into the coupler base 1, and its tip pushes the air passage closing valve body 14 built into the coupler base 1 to form an air passage.
is a connection part for a rubber tube or the like for supplying air to an air tool (not shown), and is used as an intermediate part between the two for pushing into the large diameter part of the rear part of the coupler base 1. Cylinder wall part 2
Several through holes 26 in the axial direction are opened in 5.
Inside is the coupler base 1 in the coupler body A.
As the insertion progresses, the pressure of the air pushes it outward, and the smaller diameter head 28
The plug locking piston 27 is slidably fitted into a small plug locking hole 7 provided in the coupler base 1 while lifting a small protrusion 9. Note that the reference numeral 29 in the figure is an airtight member such as an O-ring provided on the plug locking piston 27.

The coupler for air tools according to the present invention is constructed as described above, so that when it is used, the coupler body A is first inserted into the coupler base 1, and the coupling tube for the air supply rubber tube, etc. is inserted into the coupler base 1. One side is connected to an air supply source (not shown) by using a shaped member 11 and a cylindrical member 12 for holding down an air supply rubber tube, etc., which is screwed into a screw formed on the outer periphery of the air supply side of the coupler base 1. , the plug B connects the base end of an air supply rubber or the like connected to an air tool (not shown) to the rear end 24 of the plug base 21. In this state, the compressed air from the air supply source has reached the coupler body A.

Next, when using the air tool, insert the tip 23 of the plug base 21 in the plug B using the annular projecting wall 3 from the other end of the coupler base 1 in the coupler body A, and The cylindrical wall portion 25 of the plug base 21 is also inserted into the large diameter portion of the plug body 21, and the tip of the tip portion 23 is brought into contact with the leg portion 16 of the air flow path closing valve body 14.
When the valve body 14 is pushed against the force of the spring 13, the disc-shaped valve base 15 of the valve body 14 is separated from the valve seat 4, the passage 2 and the passage 22 are opened, and the flow from the coupler body A to the plug B is opened. An air flow path is formed, the compressed air is sent to the air tool, and the air tool becomes ready for use, and the compressed air that has flowed into the plug B passes through the plug locking piston 27. 22 is pushed out, and its head 28 is attached to an annular band 8 made of elastic material via a small protrusion 9.
While lifting the plug, insert it into the small hole 7 for plug locking,
This will prevent the plug B from slipping out and separating from the coupler body A. In other words, an air passage is formed by a simple operation of inserting plug B into coupler body A, and at the same time,
The locked state between the coupler body A and the plug B is completed, and this state is self-maintained using the pressure of the air used.

On the other hand, in order to detach the plug B from the coupler body A, press the lifted part of the annular band 8 made of elastic material from the outside against the pressure of the air, and use the small protrusion 9 to lock the plug. When the piston 27 is pushed down into the passage 22, the plug B is pushed out of the coupler body A by the air pressure and the force of the spring 13 transmitted through the air passage closing valve body 14. The valve body 14 is brought into pressure contact with the valve seat 4, and the air passage is closed. That is, by a simple operation of pressing the elastic annular band 8 on the coupler body A, the coupling state between the coupler body A and the plug B is released, and at the same time, the air passage is closed. At this time, the lower end of the plug locking piston 27 in the plug B protrudes into the passage 22 and narrows the passage 22, so that the compressed air remaining on the air tool side is transferred to the plug B.
By gradually dissipating it into the atmosphere through the air and preventing rapid exhaust, it is also possible to prevent the generation of sounds that can cause hearing damage.

As is clear from the above description, the pipe connection/disconnection device for a pipe joint for forming a compressed fluid passage according to the present invention has the configuration as described above, and therefore it is different from the conventional pipe fitting for a pipe joint for forming a compressed fluid passage. Like a locking/unlocking device, it is possible to connect and disconnect a pipe by just one simple operation of insertion or pressing, without requiring two or more operations that are difficult to operate. Not only this, but also the exhaust noise caused by the operator's hearing loss when leaving the system can be eliminated, which is a truly excellent practical effect.

[Brief explanation of the drawing]

The drawings also show the structure of a coupler for an air tool as an embodiment of the pipe connection/disconnection device for a pipe joint for forming a compressed fluid passage according to the present invention, and FIG. 1 is an external view thereof, and FIG. 2 is a sectional view thereof. , Fig. 3 is a sectional view when the plug is removed from the coupler body, Fig. 4 is a sectional view taken along the - line in Fig. 2, and Fig. 5 is a perspective view of the valve body for closing the air flow path. It is. X: coupler for air tools, A: coupler body, 1; coupler base, 2; air flow path, 3;
Annular projecting wall, 4; Valve seat, 5; Annular recess for support, 6;
Packing, 7; Small hole for plug locking, 8; Annular band made of elastic material, 9; Small protrusion, 13; Spring, 11;
Connecting cylindrical member for air supply rubber tube, etc., 12;
Cylindrical member for holding down air supply rubber tube, etc., 14;
Air flow path closing valve body, 15; disc-shaped valve base;
16; Leg, B: Plug, 21; Plug base, 2
2; Air passage, 23; Tip part, 24; Rear end part, 25; Cylinder wall part, 26; Through hole, 27; Plug locking piston, 28; Head part, 29; Airtight maintenance member, T ₁ : Rubber tube for air supply.

Claims (1)

[Scope of utility model registration request] A valve body for blocking the path of compressed fluid is mounted in the large diameter part of the central part of the cylindrical coupler body connected to the compressed fluid supply side via a spring so as to be able to advance and stop freely.The valve body is connected to the compressed fluid use side. A pipe joint for forming a compressed fluid passage, which is configured to push the cylindrical plug when it stops being inserted to connect the compressed fluid passage, and when the cylindrical plug is pulled out and removed, returns the valve body to its original position to close the compressed fluid passage, A plug is pushed outward by compressed fluid pressure when insertion into the coupler body is stopped, and the plug is pushed outward by compressed fluid pressure when insertion into the coupler body is stopped. While the locking piston is hermetically sealed and slidably sealed, several plug locking holes are formed in the cylindrical wall of the coupler body into which only the head of the plug locking piston is inserted. At the same time, on the outer periphery of the cylinder wall in which the small hole is formed, an annular band made of an elastic material is provided with a small protrusion that is fitted into the small hole from the outside, and the band is inserted into the small hole through the small protrusion. When the plug is inserted and locked, it is lifted by the head of the plug locking piston pushed by compressed fluid pressure, but by pressing this from the outside, the lower end of the plug locking piston is 1. A pipe connection and disengagement device for a pipe joint for forming a compressed fluid passage, characterized in that it is configured to project inward to narrow the compressed fluid passage of the plug and at the same time to enable the plug to be pulled out and removed from the coupler body.